CVE•Published 2021-12-14•1 article on news•7 live references•NVD data

CVE-2021-4073

Vulnerability data via CVEDB (Shodan)

CVSS v3.1

9.8

CRITICAL

EPSS percentile

Exploit Prediction Scoring System · top 7% of all CVEs

Description

The RegistrationMagic WordPress plugin made it possible for unauthenticated users to log in as any site user, including administrators, if they knew a valid username on the site due to missing identity validation in the social login function social_login_using_email() of the plugin. This affects versions equal to, and less than, 5.0.1.7.

Timeline

Published 2021-12-14

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2021-4073

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/registrationmagic/"

Matches any site loading the "registrationmagic" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Metagauss Registrationmagic"

All exposed Metagauss Registrationmagic instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Registrationmagic"

HTTP body or banner mentions "Registrationmagic" — catches deploys Shodan didn't identify as a product.